hmmm 20k huh
I would get engine tuner to put together either a cdb 2.35 with a twisted kit and gt35r or a full cosworth engine with same turbo.
I would add ast susp, ap brakes fitted by Brent at smd.
Get a good set of tyres and geo setup.
I reckon you would have change out of 20k....just.
Both firms mentioned have excellent reputation....imho
not that I dream much
